wsm wg972-e4 Workshop Manual page 142

WG972-E4, WSM
Clearance between Piston Ring and Piston Ring Groove
1. Clean the rings and the ring grooves, and install each ring in its
groove.
2. Measure the clearance between the ring and the groove with a
thickness gauge.
3. If the clearance exceeds the allowable limit, replace the piston
ring.
4. If the clearance still exceeds the allowable limit with new ring,
replace the piston.
Top ring
Clearance between
Second
piston ring and piston
ring
ring groove
Oil ring
Connecting Rod Alignment
1. Remove the crankpin bearing, and install the connecting rod
cap.
2. Install the piston pin in the connecting rod.
3. Install the connecting rod on the connecting rod alignment tool.
4. Put a gauge over the piston pin, and move it against the face
plate.
5. If the gauge does not fit squarely against the face plate,
measure the space between the pin of the gauge and the face
plate.
6. If the measurement exceeds the allowable limit, replace the
connecting rod.
Space between gauge
Allowable limit
pin face plate
1-S51
ENGINE
Factory
0.080 to 0.12 mm
specifica-
0.0032 to 0.0047 in.
tion
Allowable 0.15 mm
limit 0.0059 in.
Factory
0.065 to 0.10 mm
specifica-
0.0026 to 0.0039 in.
tion
Allowable 0.15 mm
limit 0.0059 in.
Factory
0.060 to 0.15 mm
specifica-
0.0024 to 0.0059 in.
tion
Allowable 0.20 mm
limit 0.0079 in.
9Y1211108ENS0089US0
0.05 mm
0.002 in.
9Y1211108ENS0090US0
KiSC issued 07, 2015 A